Torigoe K, et al. The number of leads with fragmented QRS is independently associated with cardiac death or hospitalization for heart failure in patients with prior myocardial infarction. J Cardiol. 2012;59(1):36-41

Take Y, Morita H. Fragmented QRS: What Is The Meaning?. Indian Pacing Electrophysiol J. 2012;12(5):213-25